National Weather Service United States Department of Commerce

Areas of Unsettled Weather in Alaska, the Northwest and Southeast U.S.

A storm system is bringing heavy snow, gusty winds and blizzard conditions to southwest Alaska. Coastal rain and higher elevation snowfall will continue over the Pacific Northwest and northern California through the day. In the East, a coastal storm is expected to bring a period of gusty winds, enhanced rainfall and thunderstorms from the Carolinas to the Mid-Atlantic states tonight into Friday. Read More >

 

Weather Calculators

 
 

Temperature Conversion

Enter a number then click on the the conversion button.
Fahrenheit
(o F)

Celsius
(o C)

 
 

Wind Speed Calculations

Enter a speed into any blank to convert to all other wind speeds.
 mph   knots     m/sec     km/hr   

Wind Chill Calculation

Enter the temperature in degrees Fahrenheit and wind speed in mph, then click on the Calculate WC to compute the windchill index.
Temp
(o F)

Wind
(mph)

Index

 

Relative Humidity Calculation

Enter the air temperature and the dew point in degrees Fahrenheit, then click on the Calculate RH to compute the relative humidity.
Temp
(o F)

Dew
Point

 
 

Heat Index Calculations

Enter the temperature in degrees Fahrenheit and relative humidity (RH) in percent (without the % sign), or the Dew Point (Tdp).  Then click on the Calculate HI to compute the heat index (HI).
Temp
(o F)

RH

HI

Tdp

OR

Temp
(o F)

Tdp

HI RH